Investigation report on 64 bit support and some of new features in aosp master
http://www.slideshare.net/hidenorly/investigation-report-on-64-bit-support-and-some-of-new-features-in-aosp-master-public
Investigation report on 64 bit support in Android Open Source Project
http://www.slideshare.net/hidenorly/investigation-result-on-64-bit-support-in-aosp?next_slideshow=1